From: B Horn <b...@horn.uk>
If the hooks are not removed they can be called after the module has
been unloaded leading to an use-after-free.
Fixes: CVE-2025-0622
Reported-by: B Horn <b...@horn.uk>
Signed-off-by: B Horn <b...@horn.uk>
Reviewed-by: Daniel Kiper <daniel.ki...@oracle.com>
---
grub-core/commands/pgp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/grub-core/commands/pgp.c b/grub-core/commands/pgp.c
index c6766f044..5fadc33c4 100644
--- a/grub-core/commands/pgp.c
+++ b/grub-core/commands/pgp.c
@@ -1010,6 +1010,8 @@ GRUB_MOD_INIT(pgp)
GRUB_MOD_FINI(pgp)
{
+ grub_register_variable_hook ("check_signatures", NULL, NULL);
+ grub_env_unset ("check_signatures");
grub_verifier_unregister (&grub_pubkey_verifier);
grub_unregister_extcmd (cmd);
grub_unregister_extcmd (cmd_trust);
--
2.11.0
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